• The colon character (:) is reserved in Windows and is used to denote a drive letter in file paths. For example, "C:" represents the C drive, and "D:" represents the D drive. Therefore, using a colon within a folder name would create ambiguity and confusion in file paths.

• It's important to note that other special characters like * (asterisk), ? (question mark), / (forward slash), \ (backslash), | (pipe), " (quotation mark), < (less than), > (greater than), and others are also prohibited in Windows folder names because they have specific meanings or functions within the file system.

When naming folders in Windows, it's recommended to use alphanumeric characters (letters and numbers), underscores (_), and hyphens (-) as they are safe and won't cause conflicts with file operations or path interpretation.